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ATI Radeon HD 4870 X2

Graphics Processor
R700 x2
Cores
800 x2
TMUs
40 x2
ROPs
16 x2
Memory Size
1024 MB x2
Memory Type
GDDR5
Bus Width
256 bit x2
GPU Chip
GPU
PCB Front
PCB Front
PCB Back
PCB Back
The Radeon HD 4870 X2 was a high-end graphics card by ATI, launched in August 2008. Built on the 55 nm process, and based on the R700 graphics processor, in its R700 XT variant, the card supports DirectX 10.1. The R700 graphics processor is an average sized chip with a die area of 256 mm² and 956 million transistors. Radeon HD 4870 X2 combines two graphics processors to increase performance. It features 800 shading units, 40 texture mapping units and 16 ROPs per GPU. ATI has placed 2,048 MB GDDR5 memory on the card, which are connected using a 256-bit memory interface per GPU (each GPU manages 1,024 MB). The GPU is operating at a frequency of 700 MHz, memory is running at 900 MHz.
Being a dual-slot card, the ATI Radeon HD 4870 X2 draws power from 1x 6-pin + 1x 8-pin power connectors, with power draw rated at 286 W maximum. Display outputs include: 2x DVI, 1x S-Video. Radeon HD 4870 X2 is connected to the rest of the system using a PCI-Express 2.0 x16 interface. The card measures 267 mm in length, and features a dual-slot cooling solution. Its price at launch was 550 US Dollars.

Graphics Processor

GPU Name
R700
GPU Variant
R700 XT
(215-0669045)
Architecture
TeraScale
Foundry
TSMC
Process Size
55 nm
Transistors
956 million
Die Size
256 mm²

Graphics Card

Release Date
Aug 12th, 2008
Generation
Radeon R700
(HD 4800)
Production
End-of-life
Launch Price
550 USD
Bus Interface
PCIe 2.0 x16
Reviews
79 in our database

Relative Performance

6%
GeForce 210
7%
GeForce 9400 GT
9%
Radeon HD 4550
11%
Radeon HD 5450
13%
Radeon HD 6450
14%
GeForce GT 520
17%
GeForce GT 220
23%
GeForce GT 430
23%
Radeon HD 5570
25%
Radeon HD 4670
26%
GeForce GT 440
27%
GeForce GT 240
31%
GeForce 9600 GT
33%
Radeon HD 5670
35%
GeForce GT 640
36%
GeForce 9800 GT
38%
Radeon HD 6670
39%
Radeon HD 4830
42%
Radeon HD 4770
44%
Radeon HD 4850
45%
GeForce GTS 250
46%
GeForce GTS 450
48%
Radeon HD 5750
55%
Radeon HD 7750
55%
Radeon HD 5770
56%
GeForce GTX 260
57%
Radeon HD 4870
57%
Radeon Vega 8
57%
GeForce GTX 550 Ti
58%
GeForce GTX 650
61%
Radeon HD 5830
64%
Radeon HD 6790
66%
Radeon HD 4890
68%
GeForce GTX 460
69%
Radeon RX Vega 11
69%
GeForce GT 1030
70%
GeForce GTX 275
70%
Radeon HD 7770 GHz Edition
70%
GeForce GTX 280
72%
GeForce GTX 465
75%
Radeon HD 6850
76%
GeForce GTX 285
82%
Radeon HD 5850
84%
GeForce GTX 650 Ti
84%
Radeon HD 7790
87%
Radeon RX 550
87%
GeForce GTX 470
90%
Radeon HD 6870
96%
Radeon HD 5870
99%
GeForce GTX 560 Ti
100%
Radeon HD 4870 X2
102%
GeForce GTX 750 Ti
102%
Radeon HD 6950
106%
GeForce GTX 295
107%
GeForce GTX 650 Ti Boost
108%
Radeon HD 7850
110%
GeForce GTX 480
115%
Radeon HD 6970
117%
Radeon R7 265
119%
Radeon RX 460
119%
Radeon R7 370
119%
GeForce GTX 660
120%
GeForce GTX 570
122%
Radeon RX 560
129%
GeForce GTX 950
131%
Radeon HD 7870 GHz Edition
134%
Radeon R9 270X
135%
GeForce GTX 660 Ti
136%
GeForce GTX 580
137%
GeForce GTX 1050
137%
Radeon HD 7950
140%
Radeon HD 5970
144%
GeForce GTX 760
155%
GeForce GTX 670
159%
GeForce GTX 960
163%
Radeon R9 380
164%
Radeon R9 285
166%
Radeon HD 7970
167%
GeForce GTX 680
171%
GeForce GTX 1050 Ti
176%
GeForce GTX 770
180%
Radeon HD 6990
184%
Radeon R9 280X
187%
GeForce GTX 590
187%
Radeon HD 7970 GHz Edition
207%
GeForce GTX 780
214%
GeForce GTX 1650
228%
Radeon RX 470
231%
Radeon R9 290
243%
Radeon RX 570
246%
Radeon R9 390
248%
Radeon R9 290X
251%
GeForce GTX 970
254%
GeForce GTX TITAN
258%
GeForce GTX 780 Ti
261%
Radeon R9 390X
263%
Radeon HD 7990
264%
Radeon RX 480
266%
GeForce GTX 690
280%
Radeon RX 580
286%
GeForce GTX 980
290%
Radeon R9 FURY
290%
GeForce GTX 1060 6 GB
303%
Radeon RX 590
319%
Radeon R9 295X2
321%
GeForce GTX 1660
324%
Radeon R9 FURY X
330%
GeForce GTX 980 Ti
338%
GeForce GTX TITAN X
368%
GeForce GTX 1660 Ti
368%
GeForce GTX 1070
392%
Radeon RX Vega 56
416%
GeForce GTX 1070 Ti
427%
Radeon RX Vega 64
433%
GeForce GTX 1080
433%
GeForce RTX 2060
451%
Radeon RX 5700
487%
GeForce RTX 2060 SUPER
505%
GeForce RTX 2070
517%
Radeon RX 5700 XT
522%
Radeon VII
536%
TITAN X Pascal
552%
GeForce GTX 1080 Ti
558%
GeForce RTX 2070 SUPER
594%
GeForce RTX 2080
629%
GeForce RTX 2080 SUPER
695%
GeForce RTX 2080 Ti
Based on TPU review data: "Performance Summary" at 1920x1080

Clock Speeds

GPU Clock
700 MHz
Memory Clock
900 MHz
3600 MHz effective

Memory

Memory Size
1024 MB
Memory Type
GDDR5
Memory Bus
256 bit
Bandwidth
115.2 GB/s

Render Config

Shading Units
800
TMUs
40
ROPs
16
Compute Units
10
L1 Cache
16 KB (per CU)
L2 Cache
256 KB

Theoretical Performance

Pixel Rate
11.20 GPixel/s
Texture Rate
28.00 GTexel/s
FP32 (float) performance
1,120 GFLOPS
FP64 (double) performance
224.0 GFLOPS (1:5)

Board Design

Slot Width
Dual-slot
Length
10.5 inches
267 mm
TDP
286 W
Suggested PSU
600 W
Outputs
2x DVI
1x S-Video
Power Connectors
1x 6-pin + 1x 8-pin
Board Number
B509-37

Graphics Features

DirectX
10.1 (10_1)
OpenGL
3.3
OpenCL
1.1
Vulkan
N/A
Shader Model
4.1

Card Notes

This is a dual GPU card that features two RV770XT chips and a PCI-E lane arbiter chip made by PLX. The card features a total of 2 GB GDDR5 memory.

R700 GPU Notes

Codename: Wekiva
Graphics/Compute: GFX3
Display Core Engine: 3.1
Unified Video Decoder: 2.0

Retail boards based on this design (5)

Name GPU Clock Memory Clock Other Changes
ASUS HD 4870 X2 TOP 790 MHz 915 MHz
Gainward Rampage700 GS 750 MHz 950 MHz Triple-slot, 1x DVI 1x HDMI 1x DisplayPort 1x VGA
Gainward Rampage700 GS GLH 790 MHz 950 MHz Triple-slot, 1x DVI 1x HDMI 1x DisplayPort 1x VGA
Sapphire HD 4870 X2 750 MHz 900 MHz
Sapphire HD 4870 X2 ATOMIC 800 MHz 1000 MHz Single-slot